Below is a list of Winslow IL zip codes. For your research we have also included Winslow Area Code, Time Zone, UTC and the local Stephenson County FIPS Code. Each Winslow Illinois zip code has a center Longitude / Latitude point (the Winslow center is -89.791397094727 / 42.491798400879). For your convenience we have also indicated if that zip code in Winslow observes Daylight Savings time.